Oct. 14, 2013 - 11:13AM
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VIENNA — Don't expect a breakthrough  but the chances for progress have seldom been better. This is the message coming from Iran and six world powers ahead of renewed talks this week meant to end a decade of deadlock on Tehran's nuclear program.

The two sides come to the negotiating table in Geneva on Tuesday and Wednesday amid a feel-good atmosphere that began with the June election of centrist Iranian President Hassan Rouhani. Subsequent conciliatory comments by Iranian officials were capped last month by a phone call between Rouhani and President Barack Obama  the first conversation between U.S. and Iranian leaders in more than three decades.

Iran insists it does not want nuclear weapons. But building on the momentum of that telephone call, Iranian officials from Rouhani down say their country is ready to meet some international demands to reduce its nuclear activities.

Deputy Foreign Minister Abbas Araghchi, a senior member of the Iran negotiating team, said Sunday that Tehran is bringing a new proposal to the talks meant to dispel doubts that his country nuclear program is anything but peaceful. While offering no details, he told Iran's student news agency ISNA that the Islamic Republic should "enter into a trust-building path with the West."

"In their point of view trust-building means taking some steps on the Iranian nuclear issue, and in our view trust is made when the sanctions are lifted," Araghchi said, referring to crippling U.N. and other international economic sanctions imposed over Tehran's refusal to limit its nuclear activities.

If he succeeds in building trust, the talks  including the U.S., Britain, France, Russia, China and Germany  could be the launching pad for a deal that has proven elusive since negotiations on Iran's nuclear program began in 2003. A deal would also reduce the threat of war between Iran and Israel and possibly the United States.

The latter two nations' leaders have repeatedly warned they would never accept a nuclear-armed Iran, a pledge repeated ahead of the talks by U.S. Secretary of State John Kerry. Speaking on Sunday in London he noted that while "the window for diplomacy is cracking open," Obama "means what he says" when he vows not to allow Tehran to progress to such weapons.

As to the talks, "no deal is better than a bad deal," Kerry said, serving notice that Washington would not compromise on demands it sees are necessary to ensure that Iran's atomic activities remain peaceful.

From the six-power perspective, the ideal solution would be for Tehran to scale back aspects of its nuclear program that many nations fear could aid in making a bomb. That would trigger a gradual lifting of the economic sanctions on Iran.

Even if achievable, an end-game is far away.

Gary Samore, part of the U.S. nuclear negotiating team with Iran until earlier this year, says the Geneva talks offer "the best opportunity of a decade." At the same time, he expects "a very slow grind."

Heading Iran's delegation at the talks is Iranian Foreign Minister Javad Zarif, a veteran, U.S.-educated diplomat who honed his skills as part of Tehran's team negotiating a cease-fire with Iraq 25 years ago. He says his country is ready to allow more intrusive international perusal of Tehran's nuclear program.

Other Iranian officials, meanwhile, say there is room to discuss international concerns about Iranian uranium enrichment to 20 percent  a level that is higher than most reactors use for power and only a technical step away from weapons-grade uranium suitable for warheads.

Iran now has nearly 200 kilograms (440 pounds) of 20 percent-enriched uranium in a form that can be quickly upgraded for weapons use, says the U.N's atomic agency, which keeps tabs on Iran's nuclear activities. That is close to  but still below  what is needed for one nuclear weapon. But even if Iran agrees to stop 20-percent production, ship out its 20-percent stockpile and allow more oversight by U.N. nuclear inspectors, the six powers want more.

A former senior U.N. official who has acted as an intermediary between U.S. and Iranian officials says the six seek far tighter restrictions on Iran's uranium enrichment program. He demanded anonymity because he was not authorized to publicly discuss his exploratory talks with both sides.

Specifically, the official said the six powers want significant cuts in the more than 10,000 centrifuges now enriching uranium. They also demand that Iran ship out not only the small amount of 20 percent uranium it now has but also most of the tons of low-enriched uranium it has produced. And they want caps on the amount of enriched uranium that Iran would be allowed to keep at any time.

Iran says it needs this material to power a future reactor network, and Iranian state television Sunday quoted Araghchi as saying Tehran was ready to discuss its enrichment program but would never ship enriched materials abroad. He described that stance as "our red line."

For the U.S. and its allies, low-enriched uranium is also problematic because it can also be used to arm nuclear weapons, albeit the process is longer and more complicated than for 20 percent uranium.

While seeking only to reduce enrichment at a sprawling underground facility at Natanz, the six powers also want complete closure of another enrichment plant. This unit, at Fordo south of Tehran, is heavily fortified, making it more difficult to destroy than Natanz, which lies southeast of the Iranian capital, in case it is turned toward making weapons.

Demands to reduce enrichment instead of stopping it implicitly recognize Iran's right to enrich for peaceful purposes. That already is a victory for Tehran, considering talks began 10 years ago with the international community calling on the Islamic Republic to mothball its enrichment program.

"It's pretty clear that Iran will have to be allowed some degree of enrichment," said former U.S. State Department official Mark Fitzpatrick, who now is a director at the International Institute for Strategic Studies. "But the enrichment has to be limited."

The former U.N. official said that his talks with senior Iranian officials indicate there will be tough bargaining on centrifuge numbers. Even if Tehran agrees to downsize enrichment, the Iranians will probably offer stiff resistance to closing Fordo, he added summarizing his talks with senior Iranian officials directly involved in the upcoming negotiations.

Still, Rouhani and Zarif appear to have the backing of Iranian supreme leader Ayatollah Ali Khamenei to at least explore options that would ease the sanctions crippling Iran's oil exports and financial transactions. Khamenei says he backs "heroic flexibility" in negotiations, while cautioning against too much trust in his country's enemies.

But that support may fade unless Zarif can show quick progress to skeptics at home. If he can't pull it off, the momentum may fizzle and stalemate could be renewed, leading to increased pressure from Israel on the U.S. to stop Tehran's nuclear progress by armed force.

Former Iranian nuclear negotiator Ali Larijani, who now heads Iran's parliament, spoke of "suspicious" Iranian hardliners with influence in a recent Associated Press interview. Samore, the former U.S. negotiator who now is with Harvard University's Belfer Center, also says Zarif may be hobbled by "internal resistance to making any significant concessions."